Tire-valve.



H. P. KRAFT & M. C. SCHWEINERT.

TIRE VALVE.

APPLICATlON FILED MAR. 11, 1910.

Patented Mar. 7, 1916.

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WITNESSES:

UNITED STATES PATENT OFFICE.

HENRY P. KRAFT, OF NEW YORK, N. Y., AND MAXIMILIAN CHARlIiIElS SCHWEINERT, OF

' WEST HOBOKEN, NEW JERSEY.

TIRE-VALVE.

Application filed March 11, 1910. Serial No. 548,725.

To all whom it may concern:

Be-it known that we, HENRY P. KRAFT, residing in the borough of Brooklyn, county of Kings, city and State of New 'York, and MAXIMILIAN CHARLES SCHWEIN- i the same time that they are protected from accidental injury when withdrawn from the outer shell.

The improvement provides certain other advantages referred to in detail hereinafter.

The accompanying drawings illustrate embodiments of the invention.

Figure 1 is a longitudinal section through a tire and the outer shell of a valve, showing the valve casing in elevation. Fig. 2 is a cross-section of the same on the line 2-2. Fig. 3 is a longitudinal section of the valve casing with the central parts in elevation. Fig. 4 is a section on the line '4r4 of the same. Figs. 5, 7-, 9, 11 and 13 are longitudinal sections of other constructions. Figs. 6, 8 and 10 are sections on the corresponding lines of Figs. 5, 7 and 9. Figs 12 and 14 are underside plan views of Figs. 11 and 13.

Referring to the embodiments of the. invention illustrated the valve is connected to the tire A through an outer shell B fastened thereto in the usual way, and in the outer end of which is' carried the valve casing C. The outer end of the shell .13 is internallyof octagonal or other non-circular shape and the valve casing C has a portion C of the same shape externally and adapted to fit closely into said socket and thus prevent rotation of the valve casing in the outer shell. The valve casing is fastened in place by means of a ring D screwing on the outside of the outer shelland having an inwardly projecting flange at its upper end overhanging the shoulder F on the valve casing. Below the octagonal portion 0' of the valve casing the latter is tapered and providedwith a tapered rubber Specification of Letters Patent.

Patented Mar. 7, 1916.

'washer or packing ring G fitting ,a corre spondingly tapered face in the bottom of the socket so as to make a tight joint when the ring G is screwed down. Below the packing ring G the valve casing has a cylindrical. extension H fitting easily into the cylindrical portion of the shell, providing a simple construction of the outer shell and at the same time protecting the internal mechanism of the valve against injury when the valve casing is withdrawn from the shell.

The valve proper J is conical and closes outward against the inner face of a conical seat K provided within the valve casing. A threaded stem L projects outward through the seat K into the upper part of the valve casing where it is within reach of a nipple M extending inward from a cap N which preferably is provided with an outer flange O surrounding the upper end of the valve casing The nippleM is internally threaded to fit the valve stem L'so that by screwing the cap inward upon the stem L until the cap gets into. engagement with the upper edge of the valve casing, the stem may be drawn outward with sufiicient force to seeure a good pressure of the valverproper on its seat. Or, supposing the cap removed, the valve may be pressed open to deflate the tire by simply pressing the end of the nlpple upon the end of the valve stem without screwing the cap. In the construction illustrated the pressure of air within the tire is depended upon to hold the valve closed with a moderate pressure during the nflating operation and until the cap is applied to force the valve and hold it positively against its seat.

Means are provided for holding the valve stem L against rotation so as to permit the pulling of it outward by the screwing operation of the cap described, such means being located upon the inner side of the valve proper so that the valve with its stem may be withdrawn through the inner end of the valve casing; additional means being provided for holding the valve proper and stem in the casing normally. In Fig. 3, for example, the'fixity of the valve stem against rotation is determined by forming the lower part H of the valve casing of octagonal shape and by forming an extension P on the inner side of the valve proper, the face of which is shaped similarly to that of the portion H of the casing so as to prevent rotation of the valve. The lower end of the valve casing, after the valve is in place is stopped with an end (I having a projecting octagonal edge so that it can be unscrewed and withdrawn by hand. The nut Q is provided with a central aperture for the passage of air, and the side faces of the extension P are grooved for the same purpose. In the construction shown in Figs. 5 and (S the rotation of the valve stem L is prevented by means of a flattened extension P passing through a sleeve R having an octagonal outer face fitting the similarly shaped inner face of the extension H of the valve casing, and having at its inner end a flange S with an aperture'of the same shape as the extension P of the valve. The accidental escape of these parts is prevented by means of a nut Q, as in Fig. 3.

In the construction shown in Figs. 7 and 8 the valve is provided with an extension P having longitudinal flanges T thereon fitting in similar grooves U formed in the extension H of the casing; g

In the construction shown in Figs. 9 and 10' the valve is provided with a short flat extension P fitting in a similarly shaped opening in. a ring V which is forced into the extension H of the casing so as to frictionally oppose the rotation ofthe ring and the valve. In the construction of Figs. 11 and 12 an extension P is provided of flatshape and 'passingthrough a similarly shaped opening into the nut W which is screwed into the threaded end of the casing extension H so as to be flush therewith and prevent more securely any accidental withdrawal, the withdrawal and insertion of the nut being effected by a screw-driver in engagement with the slot X in the end thereof. In the construction shown in Figs. 13 and 14 the same flattened extension P is used. The

nut Y is provided with a similar opening through which the extension passes, and is provided with a head extending laterally over the end of the casing extension H and provided with an octagonal face by which it can be screwed down upon the end of the casing with sufficient force to prevent its being turned unintentionally.

What we claim is 1. A pneumatic tire valve comprising a valve casing, an outer shell having a polygonal socket, said valve casing being separable from, and having a polygonal portion fitting in, said socket to prevent rotation thereof, and means for holding said valve casing and shell in engagement.

2. A pneumatic tire valve having a valve casing, a seat therein, a valve proper seating on an inner face of said seat, a threaded valve stem projecting outward through said seat, a cap having a threaded portion adapted to engagesaid stem for drawing the valve outward against its seat, said casing having an extension H below said valve and an angular inner face, an extension P on the inner side of said valve having an angular crosssection, non-rotatively engaging the inner face of said casing extension H, but longitudinally movable therein, and removable means for preventing the escape of said valve extension from the inner end of said casing extension, said extension P having interior dimensions large enough to admit said valve from the lower end.

In witness whereof, we have hereunto signed our names in the presence 'of two subscribing witnesses HENRY P. KRAFT. MAXIMILIAN CHARLES SCHWEINERT. Witnesses:

EUGENE V. MYERS, FRED WHITE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

